Crushing machinery.



e. H. FRASER. CRUSHING MACHINERY.

APPLICATION FlLEDlAN-Q. I906- RENEWED JAN. 12.19M-

1,220,156. Patented Mar. 20, 1917.

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' G. H. FRASER.

CRUSHING MACHINERY.

APPLICATION man JAN. 9. 1906. RENEWED JAN. 12,1911.

1,220,156. Patented Mar. 20, 1917.

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G. H. FRASER.

CRUSHING MACHINERY.

APPLICATION ms!) mu. 9. I906. RENEWED JAN. [2. m1.

Patented Mar. 20, 191].

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WITNESSES:

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CRUSHING MACHINERY- APPLICATION FILED JAN. 9,1906- RENEWED JAN. I2. I917.

1,220,156. Patented Mar. 20, 1917,

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pwrrnn s'ra'rns rarartr eEoEcE HOLT FRASER, or BROOKLYN, NEW Yo K.

CRUSHING MACHI EEY.

Specification of Letters Patent. 7 Patented BT31. 20, 1917.

Application filed January 9, 1906, Serial No. 295,254. Renewed January 12, 1917. Serial No. 142,114.

To all whom it may concern:

Be it known that I, GEORGE HOLT FRASER, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Crushing Machinery, of which thefollowing is a specification. V

'This invention relates to machinery for crushing, grinding or pulverizing materials, and aims to provide various improvements therein. In carrying out the invention in its preferred form, a revolving ring or die is used with or supported on a plurality of internal crushing rolls bearing against'the inner face of the die, improved means for carrying the rolls and supporting their bearings are provided, an improved casing is provided for inclosing the crushing parts, and various other improvements are provided which will be hereinafter more fully set forth or shown. a

In the accompanying drawings, which illustrate the preferred form of this invention as applied to a pulverizing mill,

Figure 1 is an elevation of the left hand side of the machine partly in vertical section in the plane of the lines 1lin Fig. 2;

Fig. 2 is anend elevation thereof partly in section through the feed hopper and one of the lower bearing frames approximately in the planes of the line 22 in Fig. 1;

Fig. 3 is a side elevation of'the' left hand side of the machine partly brokenaway and in vertical section in various planes; and

Fig. 4 is a rear elevation partly in vertical n1id-section on the line H in Fig. 3.

Referring to the drawings, Ais the casing, B are the side covers, C is the top bearing frame, C.B- are the check rollers, D are its bearing caps, E are the lower bearing frames, F are their bearing caps, G'isthe-feed hopper, GR is the right hand feed spout andG-L is the left hand feed spout, GrC are the covers giving access to these spouts, H is the feed deflector between the lower ends of the spouts, HR is the right hand feed chute and H L is the left handv feed chute. I are the side hole plates, J are the cheekpieces, K are the end hole plates, L-are the spring washers, O are the bolt locks, P are 7 the dust guards, T are thenut locks, U are the thrust collars, V are the driving pulleys, are. the upper oil covers, X are the lower oil covers, Yam the upper wear plates, Z is the feed gate, ZS is the stop or shut-off gate, Z-T is its lever, and Z L is its lock. 7 Thecrushing ring is lettered a, the rolls 5, their shafts 0, the pressure springs d, the

screws 6, and the discharge outlet. f. The

casing incloses and supports the ring and rolls. Three rolls are shown, one at the top 7 and the other two equally disposed within the ring. The inner face of the ring is concave and rests on the convex outer face of theupper roll, which supports it. All of the rolls" press outwardly against the inner 7 face of the ring, and this pressure is adjusted by the screws 6 acting against the springs (Z which react against the outer-wall of the casing. The pressure of the springs istransmittedby the bearing frames to the and flows past the feed gate Z on to the,

hopper plates Y in the bifurcated legs of the hoppergby which it is delivered to the spouts at each side of the mill, down which spouts it falls to the chutes, which direct it through the side covers and deliver it on to the deflector, H inside of the ring and above the feed roll. The deflector deflects the rock on to the inner faceof the ring, and the rock iscarried on this face past the rolls, by which 1t is crushed against the ring. The ring runs freely between the cheek-pieces J,

which are spaced apart from its side faces to prevent-large pieces of rock from falling off the ring, and to permit the crushed rock to escape between them and the ring and into the outer casing, down which the crushed rock falls to the-outlet. The. ring and rolls are driven in suchdi'rection that the, descending side of theringwill' be adjacent to the feed, and'atsuch speed that the centrifugal force will be suflicient to hpldthe rock on the inner face of the ring; 7 until it is ground; The ringv and yielding rolls will move to pass uncrushable objects, and each can move axially to a limited extent to adapt itself to the work being done.

The casing A is preferably a single annular casting of trough-shaped cross-section, with an opening through one or both sides large enough to pass the ring into its grinding chamber, and the casing is provided with suitable end holes communicating with this chamber and with a base h through which the outlet 7 passes. The side openings of the annular casin are preferably oval, or of greater height than width, so that the strength of the casing near its horizontal center is relatively great. This does not prevent entrance or removal of the ring however, even if the latter is a little larger than the width of the oval opening, as the ring can be rotated on a vertical axis until it passes the side edges of the opening, and can then be moved or rolled out of the easing. Near each roll the casing has on its outer part a spring seat or bearing portion N for the corresponding spring (Z, and at suitable points intermediate of' the rolls it is provided with fixed pivotal provisions for carrying the bearing frames, that for the upper frame being lettered j and those for the lower frames being lettered 7c. The cross-section of the casing is shown as U- shaped, and it is provided with internal flanges opposite the crushing rolls, and is protected from wear by bed plates 2' carried in the pockets formed by these flanges. These flanges reinforce the casing and are interrupted opposite the hand holes to give free passage at such points. The casing is widened where the flanges are interrupted, to give additional strength, and at these places it is formed with exterior flanges on its sides. It is also provided with an outer reinforcing rib. The inner edge of the casing is formed with notches m for receiv ing ears n on the cheek-pieces to insure proper positioning of the latter, see Fig. 3.

The side openings in the casing are closed by the covers B, which are each preferably removable and a single piece formed with slots for the shafts, and with hand holes for access and holes for the feed chutes. The covers B are machined on their inner faces to fit against the machined strips on the uter faces of the casing, and on their outer faces they are machined around the slots and holes, and each cover is bolted against one side of the casing so that the roll shafts project through the slots.

The cheek-pieces are preferably rings having flat faces opposite the sides of the re volving ring when the latter is flat-sided, or tapering faces when the sides of the ring are tapered, and each cheek-piece is fastened to the adjacent cover with a machine fitted joint, and has an ear or ears a for fitting into the corresponding notch m in the casing.

Each cheek-piece has an inner recess 0 for clearing the feed chute, the ears and recesses being shown as duplicated, so that a checkpiece can be used on either side of the mill. The lower part of each cheek-piece is recessed at 7? Fig. 4 to permit ground material to escape to the outlet. The cheek-pieces are fastened on the covers, and then the two are applied to the casing by slipping the covers over the ends of the shafts.

The dust guards P are bored to fit the shafts, and are faced to make a tight fit against the cover, and are shaped to cover the shaft slot in all movements of the shaft. They are made all in one piece and slip over the shafts and are supported by the bearing frame by projecting lugs which fit slidingly into the rabbeted shoulder on the frame, and which are held therein by the adjacent face of the bearing cap, the frame and cap being formed with projections which embrace the opposite sides of the lugs on the dust guards for thus supporting the guards. Each dust guard is pressed toward the cover by two coiled springs which are carried in pockets formed in the adjacent bearing frame, and react against the dust guard at approximately diametrically opposite points, so that the guard does not participate in axial movements of the frame, but does participate in all radial movements of the bearing.

The feed gate Z has a notched end to insure a central flow of feed to the spouts, and it is adjusted in its slideway by a screw which is separablv connected to it, as shown; the shut-off gate ZS has a sliding support for its inner end, and is supported by the swinging handle ZT on its outer end,

which handle is pivoted above it and is locked in its closed and opened positions by the gravity lock ZL which hooks against the hopper or casing. This swinging facilitates opening and closing movements of the gate and reduces friction. The slideways for both gates are beveled to prevent material from lodging on them, and that for the upper gate only extends part way across the iopper. The upper gate is graduated at its sides to indicate its position. The lower gate has upwardly projecting edges which pass between downwardly extending gates in the hopper, as shown.

The hopper wear plates Y interlock in the hopper legs, as shown in Figs. 2 and 3, and protect the lower walls of these legs from wear. The hopper overhangs the easing and supports the spouts, which are clamped to its under face. The lower end of each spout fits over and closes the cor responding hand hole on the adjacent cover.

Each cover B is formed with an internal flange for supporting the deflector H, see Figs. 2 and 3, which deflector is a curved bridge between the spouts and rests with its ends on these flanges between the spouts and has a central projection preventing material from jumping across from one spout to the other, and causing material coming down either spout to flow to the ring near the centerof its face. ,The chutes rest with their inner ends on the deflector and abut against shoulders thereon, while their outer ends project loosely into the spouts and rest therein, thus protecting the spouts from wear. The deflector may be reversed when its lower edge becomes worn. The chutes maybe renewed through the spouts, and the hopper plates be removed through'the hand hole in the spout when it is necessary to substitute others. The chutes are preferably L-shaped in cross-section to protect from wear both the bottom and front walls of the spouts;

The bearings are pivotally supported so that they have a swinging movement approximately radially of the ring. The bearings at the opposite ends of each shaft are rigidly united by a U-shaped frame shown as a single casting extending around the outside of the casing, and having preferably a rigid projection or integral portion pivotally connected to the casing at opposite sides thereof directly to and swinging positively from a fixed axis outward of the revolving ring and extending parallel with the axis of the latter. Near the roll each bearing frame has a spring portion between which and the casing the corresponding spring (Z is disposed, so that it reacts against the casing and the bearing frame in such manner as to tilt theframe outwardly and press the crushing roll it carries against the inner face of the ring. The top frame C is fulcrumed to the casing above the center of the ring by the ear 7', and the lower frames E are fulcrumed to the casing by the ears 76 near the base and below the lower rolls, each frame being fulcrumed at a point in advance of its roll, so that the weight of each lower roll and frame is partially available as a crushing force in addition to the action of the spring when the latter is used. The point of fulcruming each of the bearing frames will be so disposed as to best adapt the frame to the particular requirements of use, the relation shown being preferable. When the pivotal arms of the lower frames pass each other, as shown in Fig. 1, these arms are offset relatively to the bearings, so that the arm on one side will be close to the casing and that on the other side will be sufliciently distant from the easing to permit the corresponding arms of the other frame E to be likewise applied to the casing when the frame is reversed, thus enabling the use of similar frames for the two lower rolls. The top frame C'is alike on both sides, as there is no need for staggering its pivotal arms.

The top frame is formed with oil and bearing caps rabbeted into the frame to in sure alinement, the frame and caps having projections at their inner ends opposite the dust guards fol-supporting these as described. At the outer ends of the top bearings the frame and the caps project out close to the pulleys, and have planed ends against which antifriction washers run. The hubs of the pulleys bear against these washers to limit end movement of the shaft in the bearings. The washers overhang the hubs, and the hubs are drilled through to coincide with diametri'c holes through the ends of the shaft, a cross bolt being put through both to hold them in position.

The lower frames E are very similar to the top frame, but are of less projection, and the lower shafts are held in their bearings by the thrust collars U, which are bolted to the ends of the shafts as described for the driving pulleys. The lower frames have integral oil and grease wellscast on the outer sides of their which wells are closed by ers X.

The nut locks T are pivoted to the frames or caps according to location, so that they will fall over the ends by gravity or under light spring pressure, and the heads of the bolts are prevented from turning by lugs on the frames or caps, as shown.

The swinging and supporting of each frame is done from one axis in this construction, and this pivotal connection may be re-- lied on for all guiding of the frame and the resisting of all end thrust, but Iprefer to relieve this pivotal connection of some torsional strain by the check rollers C-R, which are mounted'on each bearing close to the cover, and permit endwise oscillation of the frame, and when the desired limit of such movement is reached they strike the adjacent face of the cover and check further movement. These rollers act against the cover.

Each spring cl is shown as loosely supported from its spring seat on the casing by a bolt 9, which gives it the desired lost motion but prevents its displacement. The

bearing portions, the gravity covpressure screws a screw through the frame and act against the spring washer. These are adjusted to give the desired pressure to The bolt lock O has a v V mit this adjustment of the'pressurescrew," Q

and when released automatically moves out .wardly and engages the headof the screw,

springs.

the lower locks falling by gravity and the upper lock being moved by a spring. The fingers of the look, by projecting into the holes in the frame, prevent rotation of the lock and thus prevent the corresponding pressure screw from unscrewing.

The rolls are fitted on the shafts and prevented from turning by a key. Each roll is held against a shoulder on the shaft by a collar engaging the opposite side of the shoulder and bolted to the roll. The roll has a groove opposite the collar, and the collar has a. flange projecting into this groove. The roll has holes for the bolts, and enlarged sockets surrounding these holes near the collar, and the collar has tubular projections surrounding the bolts and extending into these sockets, so that great strength is attained for the collar without requiring that it shall extend outwardly too far from the side of the roll. The opposite face of the roll has washer sockets under the heads of the nuts, and an intermediate portion with a plurality of hammer spots on which one may pound to drive the roll on the shaft, thus avoiding danger of im* pairing either the periphery or the central bored portion of the roll. The collar has sockets and flanges for receiving and guard ing the bolt heads, and an annular inner flange on its outer side.

In operation, the bearings will swing in and out slightly, and will oscillate slightly to adapt themselves to the work and avoid rigidity. The strains on them will be partly transmitted to their pivotal connections to the frame, and partly to the pressure They will be sutflciently cushioned by these springs to avoid breakage due to shock or vibration. If the wearing parts are to be renewed, the bearing caps will be unbolted from their frames, and the top frame will be swung outwardly until it is clear from the side covers. The bottom frames will be free from their pivotal connections and move outwardly until they are free from the side covers. The covers will then be removed and the rolls and shafts withdrawn. The ring will be turned edgewise until it will pass out through the side of the casing, whereupon it can be rolled out and another can be replaced. The cheek-pieces will be removed if necessary and new ones attached to the covers. To reassemble the mill, the shafts and rolls will be replaced within the ring after the latter has been moved into the casing, the covers will be applied, the bearing frames will be moved back into position and connected to their pivotal connections, the caps will be replaced, the parts connected, and operation may be resumed.

It will be seen that the machine described may be built with great simplicity and compactness, and will have great strength, efliciency, and a desirable flexibility, and that the swinging support of the frame which unites the two bearings of each shaft contains many important advantages, and it will be understood that this invention is not restricted in scope to the specific construction shown and described as being its pre ferred form, as the invention may be availed of in whole or in part in any modified form which circumstances or the judgment of those skilled in the art may dictate, without departure from the new principles involved in this invention.

I Vhat I claim is 1. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, three rotatable crushing rolls movable toward and from each other within and eccentric to said die and each having a peripheral crushing face reciprocal to the inner "ace of the latter, means for revolving one of said parts, three swinging non-rotative carriers on which said rolls are rotatably mounted respectively, each of said carriers pivotally mounted directly on and swinging positively from a fixed axis, and means acting on said carriers intermediate of their pivotal mountings and said rolls and out of line with the latter to move said rolls outwardly away from one another and toward the inner face of said die to resist a crushing pressure therefrom.

2.'In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, two rotatable crushing rolls movable toward and from each other within and eccentric to said die and each having a peripheral crushing face reciprocal to the inner face of the latter, means for revolving one of said parts, two swinging non-rotative carriers on which said rolls are rotatably mounted respectively, each of said carriers pivotally mounted directly on and swinging positively from a fixed axis disposed outwardly and downwardly of the axis of rotation of its roll, and means acting on said carriers to press said rolls outwardly awayfrom one another toward the inner face of said die to resist a crushing pressure therefrom.

3. In combination, an annular crushing die revolving in an approximately vertical plane and having aninternal crushing face, two rotatable crushing rolls movable toward and from each other within and eccentric to said die and each having a peripheral crushing face reciprocal to the inner face of the latter, means for revolving one of said parts, a frame or casing for said parts, two non-rotative members movable toward and from each other on which said rolls are rotatably mounted respectively, said members extending past each other and movably mounted on said casing beyond their overlapping portions, and a spring or springs acting on said members to press said rolls outwardly away from one another to resist a crushing pressure from the inner face of said die.

4. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushingv face, three rotatable crushing rolls within and eccentric to said die and each having a crushing face reciprocal tothe inner face of the latter, one of said rolls near the upper part of said die, and the other two of said rolls below said upper roll and movable toward and from each other, means for revolving one of said parts, swinging non-rotative carriers on which said lower rolls are rotatably mounted respectively, each of said carriers pivotally mounted directly on and swinging positively from a fixed axis below the axis of its roll, and means actingon said carriers to press said rolls outwardly away from one another to resist a crushing pressure from the inner face of said die. 7

5. A revolving crushing ring and a crushing roll therein supporting said ring, n combination with a casingincloslng sald parts and having an opening through its side large enough to pass said ring and having a pivotal provision outwardly of sa d opening, anda cover for said casing closing said opening and having an aperture for the shaft of said roll, and movable 'bearmgs for said shaft at the sides of said casing, pivoted directly to and swinging positivelyfrom a fixed axis and passing around the exterior of said casing for connecting said bearings having rigid projections pivoted to said casing outwardly of said cover.

6. In combination, a revolving annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face acting against said face thereof, means revolving one of said parts, a casing inclosing said parts and having a chamber larger than said die, and having-an aperture communicating in said chamber large enough to pass said die, and having outwardly of said aperture and beyond the periphery of said die afixed pivotal supporting provision, and a movable non-rotat1ve carrier for said roll disposed opposite and movable beyond said aperture and having a rigid projection projecting beyond said aperture and pivoted outwardly of sald die directly to and swinging positively from said pivotal provision, said die removably carried in said chamber and removable through said aperture.

7 In combination, a revolving annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face acting against said face thereof, meansrevolving one of saidwparts,a cas ing inclosing said. partsand having a chamberlarger than said die, and having'an ap erture communicating with said and of greater length and less width than saiddie, and having outwardly offsaidaperture and beyond the periphery of said die a fixedpivotal supporting provision, and a movable non-rotative carrier for said roll disposed opposite and movablebeyond said aperture. and having. a rigid projection projecting beyond said aperture-land pivoted outwardly thereof directly to and swinging positively from said pivotal provisiomsaid die movable in said chamber and removable edgewise through said aperture. 2

8. In combination, .a revolving annular crushing die having an internal vcrushing face, a movable and rotatable crushing roll. within and eccentric of saiddie and having a peripheral crushing face for acting against said face thereof,means revolvingone of said having a chamber larger thansaid die, and having an aperture communicating with said chamber, a cheek piece disposed in said-vapchamber parts, a casing inclosingsaid. parts, 7

erture opposite and cooperating with said i die, said cheek piece and casing having reciprocal recesses and projections 'forposit-ioning said parts, means for supporting said piece from said casing, and a movable and non-rotative carrier for said roll, disposed opposite and movable outwardly of said cheek piece, extending substantially radially across the latter and pivoted outwardly thereof directly to and swinging positively from a fixed axis.

9. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, a plurality of rotatable crushing rolls movable toward and from each other within and eccentric to said die and. each having an external crushing face reciprocal to the internal crushing face thereof, means for re-, volving one of said parts, non-rotative movable means rotatably carrying one of said rolls pivotally mounted on and swinging from an axis disposed above the horizontal plane of the axis of said die,xand non-rotative movable means carrying another of said rolls pivotally mounted on and swinging directly from a fixed axis disposed below such plane, and means pressing said rolls away from one another to resist a crushing pressure from the inner face of said die.

10. The combination with a crushing roll of a bearing frame pivotally mounted directly on and swinging-positively from a fixed axis, and having bearing portions near its extremities, and a U-shaped body portion between and connecting said portions, a support connected to said pivotal portions remote from said bearing portions, anda revolving ring supported by said roll.

11. The combination with a crushing roll, of a bearing frame for crushing machinery pivotally mounted directly on and swinging positively from a fixed axis, and having bearing portions near its extremities, an intermediate body connecting said portions, rigid projections having pivotal portions re mote from said bearing portions, and stop provisions near its extremities for limiting motion axially of said bearing portions, and a support engaging said projections.

12. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, three rotatable crushing rolls movable toward and from each other within an eccentric to said die and each having a peripheral crushing face reciprocal to the inner face thereof, one of said rolls disposed near the upper part of said die and the others disposed below said roll, means for revolving one of said parts, three swinging non-rotative carriers on which said rolls are rotatably mounted respectively, said carrier for said upper roll pivotally mounted directly on and swinging positively from a fixed axis above said lower rolls, and said carriers for said lower rolls each pivotally mounted directly on and swinging positively from a fixed axis below said lower rolls, and means acting on said carriers for pressing said rolls outwardly away from one another toward the inner face of said die to resist a.

crushing pressure from the inner face of the latter.

13. The combination with a revolving ring, and two crushing rolls therein, of a casing inclosing said parts, and frames carrying said rolls, and pivoted to said casing below and intermediate of said rolls.

14. The combination with a revolving ring, and two crushing rolls therein, of a casing inclosing said parts, and frames carrying said rolls, and pivoted to said casing below and intermediate of said rolls, said frames having rigid pivotal projections, those of one frame crossing those of the other frame.

15. The combination with a revolving ring, and two crushing rolls therein, of a casing inclosing said parts, and frames carrying said rolls, and pivoted to said casing below and intermediate of said rolls, said frames having rigid pivotal projections relatively staggered so that each frame may be used with the other at either side of the machine.

16. A revolving ring, and two crushing rolls therein, in combination with a casing for said parts having pivotal provisions at each side of its center below said rolls, and a bearing frame for one of said rolls pivoted to said casing at the other side of its center from that occupied by the roll carried by said frame.

17. A revolving ring and two crushing rolls therein, in combination with a casing for said parts having pivotal provisions at one side of its vertical center and a spring seat at the other side thereof, and a bearing frame for said roll pivoted to said casing at one side of said center, carrying said roll at the other side of said center, and having a portion opposite said seat, and a spring re acting against said casing and frame.

18. A revolving ring and two crushing rolls therein, in combination with a casing for said parts having a pivotal provision and a spring seat, a bearing frame for said roll pivoted to said provision and having a portion opposite said seat, and an inclined spring between and reacting, against said seat and portion.

19. A revolving ring and two crushing rolls therein, in combination with a casing for said parts having an outlet below said ring, of frames carrying said rolls, and pivotal provisions supporting said frames from said casing and traversing said outlet.

20. In a crushing machine, bearings in combination with a shaft carried thereby and having axial movement therein, saidshaft and bearings having thrust provisions for limiting such movement, and said shaft having an integral projecting shoulder, of a crushing roll seated on said shaft and having a face engaging said shoulder, and a recess outwardly of said face, and a retaining collar surrounding said shaft and engaging said shoulder, and having a flange entering said recess, and means traversing said roll and collar for clamping the two together against said shoulder.

21. In combination, an annular crushing die revolving in an approximately vertical plane and having a rotatable crushing roll within and eccenan internal crushing face,

trio of said die and having a peripheral crushing face reciprocal to the inner face of said die, means parts, non-rotative swinging means on which said roll is rotatably mounted pivotally mounted directly on and swinging positively from a fixed axis, pressing means acting toward said swinging means to press said roll upwardly toward the inner face of said die to resist a crushing pressure from the latter, and means for supporting said parts.

22. In combination, an annular crushing die revolving in an approximately vertical 7 plane and having an internal crushing face, a rotatable crushing roll within and eccentrio of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, nonrotative swinging means on which said roll is rotatably mounted pivotally mounted outside of said die directly on and swinging positively from a fixed axis,

for revolving one of said i disposed outwardly of the axis of said roll, and pressing means acting toward said swinging means to press said roll upwardly toward the inner face of said die to resist a crushing pressure from the latter.

23. In combination, an annular crushing die revolving in an approximately vertical plane and having on internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, a casing affording a crushing chamber for said parts, non-rotative swinging means on which said roll is rotatively mounted pivotally mounted outside of said chamberdirectly on and swinging positively from a fixed axis, and pressing means acting toward said swinging means to press said roll upwardly toward the inner face of said die to resist a crushing pressure from the latter.

24. In combination, an annular crushing die revolvin in an a .roximatel vertical plane and having an internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, a casing affording a crushing chamber for said die and roll and having an opening communicating with said chamber at the side of said roll, non-rotative swinging means on which said roll is rotatably mounted in line with said opening pivotally mounted directly on and swinging positively from a fixed axis disposed outside of said opening, and pressing means acting toward said swinging-means to press said roll upwardly toward the inner face of said die to resist a crushing pressure from the latter.

25. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, a casing affording a crushing cham ber for said die and roll having a removable cover at the side of said roll having an opening in line with said roll, nonrotative swinging means on which said roll is rotatably mounted pivotally mounted directly on and swinging positively from a fixed axis disposed outside of said chamber, pressing means acting toward said swinging means to press said roll outwardly toward the inner face of said die to resist a crushing pressure from the latter, and a vertically movable plate or cover for closing said opening in said removable cover moving with said swinging means.

26. In combination, an annular crushing die revolving in an approximately vertical non-rotative swinging means on which said rolls are rotatably mounted respectively each pivotally mounted directly on and swinging positively from a fixed axis, pressing means acting toward said swinging means to press said rolls outwardly from one another toward the inner said die to resist a crushing pressure from away" face of the latter, and upwardly and downwardly movable. closing means for said openings in line with said rollsrespectively moving with said swinging means respectively.

27. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, two rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of,

said parts, a casing affording a crushing chamber for said ring and rolls having side openings in line with said rolls respectively, non-rotative swinging means on which said rolls are rotatably mounted respectively each pivotally mounted directly on and swinging toward and from each other positively from a fixed axis, pressing means acting toward said swinging means to press said rolls away from each other toward the inner face of said die to resist a crushing pressure from the latter, inwardly and outwardly movable closing means for said openings respectively moving with said swinging means respectively.

28. In combination, an annular crushing die revolving in an approximatelyvertical plane and having an internal crushing face, three rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, non-rotative swinging means on which said rolls are rotatably mounted respectively each on and swinging positively from a fixed axis, pressing means acting toward said swinging means to press said rolls outwardly toward the inner face of said die to resist a crushing pressure from the latter, and means for supporting said parts.

29. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, three rotatable. crushing rolls within and eccentric of said die and each having a pepivotally mounted directly ripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, a casing affording a crushing chamber for said die and rolls, non-rotative swinging means on which said rolls are rotatably mounted respectively each pivotally mounted directly on and swinging positively from a fixed aXis disposed outside of said die, pressing means acting toward said swinging means to press said rolls outwardly toward the inner face of said die to resist a crushing pressure from the latter and means for supporting said parts.

30. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, three rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of Copies of this patent may be obtained for said parts, a casing affording a crushing chamber for said die and rolls having a re movable cover at the side 01 the latter, nonrotative swinging means on which said rolls are rotatably mounted respectively each pivotally mounted directly on and swinging positively from a fixed axis disposed outwardly of said removable cover, and pressing means acting toward said swinging means to press said rolls outwardly toward the inner face of said die to resist a crushing pressure from the latter.

In witnesswhereof, I have hereunto signed my name in the presence of two subscribing witnesses.

GEORGE HOLT FRASER.

\Vitnesses THOMAS F. WALLACE, FRED WHITE.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

